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Universal Instrument Guide and Surgical Insertion Tool for Stereotactic Frames

IP.com Disclosure Number: IPCOM000011023D
Publication Date: 2003-Feb-07

Publishing Venue

The IP.com Prior Art Database

Abstract

A universal instrument stop guide and universal surgical insertion tool meet the critical measurements necessary to function interchangeably with the Leksell, Cosman-Roberts-Wells (CRW), and potentially other stereotactic frames in performing stereotactic procedures, for instance, for deep brain stimulation. A single kit including the universal guide and tool replaces frame-specific components and, as a result, relieves frame-component buyers from having to purchase frame-specific components.

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Universal Instrument Guide and Surgical Insertion Tool for Stereotactic Frames

Background and Summary

                � � � � � � � � � � � � � � � � � � � � � � � A typical stereotactic apparatus consists of a rigid frame that is mounted on the head.� The frame’s purpose is to provide both a rigid fiducial marker system during imaging of the skull and brain and a rigid platform for mounting instruments during surgery. The set of fiducial markers is visualized with the respective imaging modalities and provides a coordinate system within which targets appearing in the images may be localized. The frame also provides the means for determining coordinate transformations between "frame-space" and "image-space".

                � � � � � � � � � � � � � � � � � � � � � � � A stereotactic arc is attached to the stereotactic frame during the surgical procedure and serves as a mounting platform for introduction of surgical instruments.� The arc is designed such that when properly mounted to the stereotactic frame, all instruments are precisely inserted to the appropriate target depth.� The appropriate target depth is calculated based on different principles that are frame dependent.

                � � � � � � � � � � � � � � � � � � � � � � � Stereotactic frames are used to perform a wide range of neurosurgical procedures.� These neurosurgical procedures include diagnostic stereotactic microsurgery (tumors, infectious diseases, systemic disorders), guidance (lesioning, tumor removal), functional therapy (movement disorders, pain), and evacuations (implantations, brachytherapy, intracavitary treatments, gamma knife surgery).

                � � � � � � � � � � � � � � � � � � � � � � � The two most popular frames used for stereotactic surgical procedures are the Leksell® (manufactured by Elekta) and CRWTM (Cosman-Roberts-Wells manufactured by RadionicsTM).� Other frames include, but are not limited to, the Leibinger® frame (manufactured by Stryker®).

                � � � � � � � � � � � � � � � � � � � � � � � A universal instrument guide for stereotactic frames described in this publication is compatible with different stereotactic frames by providing a universal instrument stop guide and/or a universal surgical insertion tool that can be used at least in the Leksell® and CRWTM frames and potentially other stereotactic frames.� The universal instrument stop guide and universal surgical insertion tool satisfy the critical dimensions necessary to function with the Leksell and CRW frames.

                � � � � � � � � � � � � � � � � � � � � � � � The universal instrument stop guide, universal surgical insertion tool, and other universal tools that can be included in stereotactic procedure kits, can save hospitals and medical professionals thousands of dollars.� Hospitals that already own different stereotactic frames must currently purchase multiple kits that are compatible with each of the different frames.� A universal kit including the universal instruments described herein would lighten this unnecessary and cumbersome economic burd...